343 



CLASS XXI. MONCECIA. 



Plants having Flowers furnished "with Stamens only, and 

 Flowers furnished with Pistils only, on the same individual. 



Order I. MONANDRIA. One Stamen. 



1. EUPHO'RBIA. Involucre with numerous barren or stameniferous 



flowers, and one fertile or pistilliferous. 

 Barren flower. Calyx none. Corolla none. 

 Fertile flower} Calyx none. Corolla none. Capsule three-lobed. 



Styles threecleft. 



2. ZANNICHE'LLIA. Involucre none. 



Barren flower. Calyx none. Corolla none. 



Fertile flower. Calyx of one leaf. Corolla none. Germens four or 

 more. Seeds four, stalked. 



( Callitriche. Typha minor.) 



Order II. DIANDRIA. Two Stamens. 

 (Calex pulicaris, stellulata, and other species.) 



Order III. TRIANDRIA. Three Stamens. 



4. SPARGA'NIUM. Flowers in globular heads. 

 Barren flower. Calyx three-leaved. Corolla none. 



Fertile flower. Calyx three-leaved. Corolla none. Drupe dry. 



5. CA'REX. Flowers in imbricated catkins. 



Barren flower. Calyx a chaff-scale. Corolla none. 

 Fertile flower. Calyx a chaff-scale. Corolla a husk, investing the 

 loose seed. 



6. ELYNA. Flowers in imbricated, two-rowed catkins. 



Barren flower. Calyx a chaff-scale. Corolla none. 

 Fertile flower. Calyx a chaff-scale. Corolla none. Seeri one, 

 loose. 



3. TY'PHA. F/otcm in a cylindrical, hairy catkin. 



Barren flower. Calyx none. Corolla none. Anthers three on each 



filament. 

 Fertile flower. Calyx none. Corolla none. Seed one, on a hairy 



stalk. 



OrderlV. TETRANDRIA. Four Stamens. 



11. ERIOCAU'LON. Flowers in a compact scaly head. 



Ba?-m flower, in the middle. Ca/i/i none. Corolla of one petal, 



with four or six segments. Stamens four or six. 

 Fertile flower, in the circumference. Pefa/s four or six. Style one. 



Capsule superior, two or three-lobed. Seeds solitary. 

 7. LITTORE'LLA. Barren flower. Calyx four-leaved. Corolla 



with four segments. Stamens hair-like, very long. 

 Fertile flower. Calyx none. Corolla unequally three-cleft. Style 

 very long. Nut one-celled. 



